Corrugation in hopper doors for railroad cars



' 1.638,167 1927' v. E. SISSON CORRUGATION IN HOPPER DOORS FOR RAILROAD CARS Filed Aug. 1.5, 1925 Patented Aug. 9, 1927.

UNITED STATES VINTON E. SISSON, OF CHICAGO, ILLINOIS, ASSIGNOR T UNION METAL PRODITCTS COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

CORRUGATION IN HOPPER DOORS FOR'RAILROAD CARS.

Application filed August The invention relates to a railway dump carhaving a door forming a part of the car for retaining the load therein, which door is provided with hinges adjacent one of its sides and is capable of being dropped? or swung open so that the load in discharging slides or passes over the upper surface of the door. Any means of raising the door to the closed position and any means for locking and releasing the door may be employed with my device.

A door for this purpose must be very strong and durable because:

First: It is part of the floor of the car and as such must sustain the load as well as theimpact blow when the car is in motion.

Second: The car is frequently loaded from chutes or tipples from a height of ten feet or more. causing the load to be dropped directly upon the doors.

Third: Clam shell buckets are frequently used to unload such cars and it is not uncommon for these buckets to rest upon and drag over the doors. p Fourth: When the door suddenly comes to rest after being dropped, it is not only subjected-to a severe shock but it must sustain the severe impact thrust of the load which, of course, follows the door.

Fifth: As the load is theoretically equally distributed, the door must be strong over its entire area andmust be capable of trans- :mitting the resulting strains to the car body without much deflection and no substantial distortion. Any bending of the door would cause a leak of the lading, especially of such fine material as sand, chats. etc. Any bending or warping might interfere with the complete closing and locking ofthe door.

is'it does to haul a .ton of paying freight, it is imperat-iye that the car and any partthereof be as light as possible. Further- :more, the total weight of the car and freight is determined by the strength of certain fstandard axles, so that the lighter the car the greater amount of freight a given car will be allowed to carry. I

The advantages of my door are applicable aorrany door of a freight car'over which the "lading moves when being discharged from the car, such as drop bottom gondola service cars, (usedin the drawings), hopper cars, swinging side doors or hopper bottom coal cars,uetc.- 14 V As it costs as much to'haula' ton of car o 13, 1925. Serial- No. 50,043.

An object of this invention is to providea plate metal door with corrugations of particu'ar contour that from their form are peculiarly adapted to meet the stresses and strains already described, and at the same time, to provide a very lightand inexpensive door. The number of the corrugations will depend upon the number and location of the hinges; In the drawings:

Fig. 1 shows a portion of a railway car with my device applied thereto.

Fig. 2 is asection on line 22 of Fig. 1.

Fig. 8 is a sectionon line 33 of Fig. 1.

Fig. 4 is an enlarged section through a corrugated portion of the plate.

A plurality of parallel strengthening cor-u rugations 2 are formed in the metallic plate and terminated at their ends 3 into the plane of the plate so that the door has a flatmarginal portion about its sides. The particular contour of the corrugation is illustrated in the large sectional view of Fig.4. Each corrugation is formed with main walls 4 substantially perpendicular to the plane of the plate which are connected by outwardly projecting members comprising two or more flat portions 55 positioned a-ngularly to each other. Each corrugation is wider than the distance 30 between parallel planes 31 and 32 drawn through the outermost parts of the corrugated plate. The greater the distance between the main walls, the greater the width of the connecting portions, and consequently more metal is positioned away from the-neutral axis 1010 of the section, resulting-in a higher section modulus,

meaning, of course, theoretically. I

The'connecting portion (5) is a (secondary) beam and must transmit the loadimposed upon it 'to the main walls 44. In actual practice, a flat connectingportion will deflect and not perform its function if the main walls are'spaced very far apart. My construction increases the capacity of the connecting member to transmit thrusts" a stronger corrugation,

. to -the,a djacent main walls and therebylpermits the main walls to be spaced further apart, thus'obtaining a higher section modulus, as stated-above. The width of each corrugation ispreferably constant throughout the major portion of its length. l The outwardly projecting portions 5-5 between the walls act in the manner of an ti'ons parallel with hinges adj The parts of the door 6 remaining (positionedl between the adjacent corrugations are preferably formed similar to the outwardly projecting portions of the corruga tion but project oppositely thereto, thus placing the neutral axis 10-10 of the cor.- rugated plate midway between parallel planes drawn through the outermost parts of the corrugated plate. It is preferable to position the corrugathe direction oi the discharging cargo so that they will not interfere with its free movement. Howeyer, the corrugations may be positioned normal or at right angles to the direction of the moving cargo in fact, obliquely thereto) or the corrugations may be pressed entirely from either side of the plate (i. e. projecting upwardly or downwardly) or maybe pressed partially from one sideand partially from the other side ot the plate i't'desired.

Any of such arrangements would come Within the scope of this invention.

What I claim'is:

1.. In combination with the other elements of a railway dum.) car, a door supported by hinges adjacent one side made of a metallie plate formed with integral corrugations having main walls. connected by outwardly projecting members comprising portions angnlarly positioned to each other.

2. In combination with the other elements of a railway dump car, a door supported by acent one side made of a metallic plate formed with integral corrugations of constant width throughout the major portion of their length having main walls connected by outwardly projecting members comprising portions angularly positioned to each other. v

In combination with the other elements of a railway dump car. hinges adjacent one side made of: a metallic plate formed with integral. corrugations merged into the plate at their ends having by outwardly pro ect-' main walls connected ing members comprising portions angularly positioned to eachother. V

l. In combination with theother elements of a railway dump car, a door supported by hinges 'adjaccnt one side made of a metallic plate formed with integral corrugations spaced apart distances equal to their width having main walls connected by outwardly projecting members comprising portions anfgularly positioned to each other.

T 5. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic plate formed with integral corrugations of constant wldth throughout the major portion of their length and spaced apart disa door supported by posite direction ofsaid members.

'posite direction of tances equal to their width and merged into the plate at their ends, said corrugations having main walls connected by outwardly projecting members comprising portions angi-ilarly positioned .to each other. i

6. In combination with the other. elements of a railway dump eanadoor supported by hinges adjacentone side made or" a metallic plate formed with" integral corrugations having main walls connected by outwardly projecting member's comprising portions angularly positioned to each other and the spaces between said corrugations formed similarly to but projecting in the opposite direction of said members.

7. In combination with the other ele ments of a railway dump car; a door supported by hinges adj acent one sidejmade of a metallic plate formed with integralcor rugations of constant width throughoutthe major portion of their length having main walls connected by outwardly projecting members comprising portions angularly' p0- sitioned to each other and the spaces between said corrugations formed projecting in the opposite direction of said members.

S. In combination with the other ele ments of a railway dump car, a doorsupported by hinges adjacent one side made of a metallic plate formed with integral corrugations merged into the plate at their ends having main walls connected'by outwardly projecting members comprisingportions angular-1y positioned to each other "and the spaces between 'said' corrugations 'lorined similarly to but projecting in theopposite directionof said members. I Y f 9. In combination 'with the other elements of a railway dump car, a doorsupported by hinges adjacent one side made of a metallic plate tormed with integral coroutwardly projecting members comprising IUI) "rugations spaced apart distances equal to their width hainng main walls" connectedloy portions angularly; positioned to g each other H and the spaces between said corrugations formed imilarly to butproj ecting inthe'op- 10. In combination with the other "elements of a railway dump car, a door-supportedby'hinges adjacent one side made of a metallic plate formed 'with integral corrugatio'ns of constant width throughout the major portion of their length and spaced apart distances equal to their 'widthand merged into the plate at their ends said corrugations having m'ain' walls connected by outwardly pro ect ng members comprising portions angularly positioned to each other? and the spaces between; said corrugations formed similarly to butproj'ecting inthe opsaid members. r 11. In combination with other. elethe ments of a railway dump, carfa door sup- '1 similarly t b t no ported by hinges adjacent one side made of a metallic plate formed with integral corrugations having main walls connectedby outwardly projecting members comprising portions angularly positioned to eachother, the width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate.

12. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a'metallic plate formed with integral corrugations merged into the plate at their ends having main walls connected by outwardly projecting members comprising portions angularly positioned to each other, the width of each corrugation being greater thanvthe distance between parallel planes drawn through the outermost parts of the corrugated plate.

13. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side. made of ametallic plate formed withintegral corrugations of constant width throughout the major portion of their length and spaced apart distances equal to their width and merged into the plate at their ends, said corrugations having main walls connected by outwardly projecting members comprising portions angularly positioned to each other,

the width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate. I 14. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of. a metallic plate formed with integral'corrugations having main walls connected by outwardly projecting members comprising portions angularly positioned to each other and the spaces between said corrugations formed similarly to but projecting in the opported by hinges adjacent one side made of a metallic plate formed with integral corrugations merged into the plate at their en s having main walls connected by outwardly pro ecting members comprising portions angularly positioned to each other and the spaces between said corrugations formed similarly to but projecting in the opposite direction of said members the width of each. corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate.

16. In combination with the other elements of a railway dump car, a door supported by hinges adjacent one side made of a metallic. plate formed with integral corrugations ofv constant width throughout the major portion of their length and spaced 7 apart distances equal to their width and merged. into the plate at their ends, said corrugations having main walls connected by outwardly projecting members comprising portions angularly positioned to each other and the spaces between said corrugations formed similarly to but projecting in the opposite direction of said members, the width of each corrugation being greater than the distance between parallel planes drawn through the outermost parts of the corrugated plate.

17. In a railway car, the combination of a door having a plurality of parallel downwardly projecting embossments 'formed therein with flat places between some of said embossments, and hinges parallel to said embossments secured to said flat places.

.VINTON E. SISSON. 

